adiabatic, I don't know but I might think that fragmentation is also a measure of how discontinuous the free block space is on the disk. Freeing up files creates free blocks in those dispersed areas. Maybe. Don't quote me on it.

better than _my_ best guess, at least.

I wonder how big the new files are…

I save off articles and then never have time to read them in detail. But look at this one: utcc.utoronto.ca/~cks/space/blog/solaris/ZFSZpoolFragmentationDetails

It's 10 years old now from 2015 so I am sure many details will be different but it is a place to start.

The new ones are all 67 MB apiece.

this looks like it's gonna be the ticket but I'm gonna have to get a good night's sleep before it makes sense

thanks!

I think in general the wisdom of the net has been that the frag reported in zpool list does not mean what we coming from other file systems thinks it means. And that we can pretty much not worry about it. As long as there is enough free space for the file system to work. Keep 5%-10% free.

I don't even _remember_ fragmentation percentages in Norton Utilities or Diskeeper or whatever it was for NTFS.

But it's kind of been a while.

rwp I will also relisten or read the transcript from the latest 2.4ad podcast there was question from the listeners.

rwp my install would hold the contents of /var/opt/mssql (sql server) for a linux vm.

s2r, The command I listed was the one I found as the recommended combination of features for MariaDB/MySQL databases.